Like a pen, the primary characteristic of a brush is its
color. To help you create a simple brush, the System.Drawing namespace
provides the static sealed Brushes class. The only feature this class
provides is the ability to specify a color to use on a brush. As a static class,
you never have to instantiate it.

To create a simple brush whose only information is provided
by its color, call the Brushes class and access a color by qualifying it with
the name of the class. Each color is provided by its name as a property. Here is
an example of using the class:

The simplest type of brush is referred to as solid. This
type of brush is simply equipped with a color and it is used to fill a shape
with it. To get a solid brush, you use the SolidBrush class defined in
the System.Drawing namespace. It has only one constructor declared with
the following syntax:

public SolidBrush(Color color);

The color passed as argument must be a valid
definition of a Color. Here is an example:

If you plan to use different colors to fill different
shapes, you don't have to create a new brush for each shape. At any time, before
re-using the same brush previously defined, you can simply change its Color. For
this reason, the SolidBrush class is equipped with the Color property.
Here is an example of using it:

Like most objects used in graphics programming, a brush
consumes the computer resources. Therefore, after using it, you can free the
resources it was using by calling the Dispose() method. Here is an example: